After 100 races he just keeps going and going

A writer discovers the most underrated, painful, and demeaning obstacle in the world—the burpee.

The Tough Mudder and Spartan Race champ is paving a new path through the sport

Obstacle courses are the biggest thing in adventure sports, with millions of amped-up Americans charging into the slop—and a cadre of cutthroat entrepreneurs cashing in. No one is profiting more than Tough Mudder creator Will Dean, a polished Englishman and Harvard Business School grad who will stop at nothing to sell you his brand of suffering.